Resolve deprecation warnings in Docs/tools

[drts01]

Documentation

The following scripts are throwing deprecation warnings.

• Docs/tools/extensions/pyspecific.py
• Docs/tools/extensions/glossary_search.py

PendingDeprecationWarning: nodes.Node.traverse() is obsoleted by Node.findall()

Linked PRs

• gh-119317: findall instead of traverse for docutils nodes #119319
• [3.13] gh-119317: findall instead of traverse for docutils nodes (GH-119319) #119486
• [3.12] gh-119317: findall instead of traverse for docutils nodes (GH-119319) #119487

[hugovk]

Looks like this is from docutils 0.18.1 (2021-11-23):

New method Node.findall(): like Node.traverse() but returns an iterator. Obsoletes Node.traverse().

https://docutils.sourceforge.io/HISTORY.html#release-0-18-1-2021-11-23